package main;

import java.util.Random;

public class Main {
public static void main(String[] args) {
	int [] a1 = null;//////////////1
	int [] a2 = {11,22,33,44,55};//2
	int [] a3 = new int [5];///////3
	int [][] a4 = null;////////////4
	
	// ///////////////////////////////////1
	a1 = new int[] { 1, 2, 3, 4, 5 };
	for (int item : a1) {
		System.out.print(item + " ");
	}
	System.out.println();

	// ///////////////////////////////////2
	for (int item : a2) {
		System.out.print(item + " ");
	}
	System.out.println();

	// ///////////////////////////////////3
	Random random = new Random();
	for (int i = 0; i < a3.length; i++) {
		a3[i] = random.nextInt(10);
	}
	for (int item : a3) {
		System.out.print(item + " ");
	}
	System.out.println();

	// ////////////////////////////////////4
	a4 = new int[4][4];
	for (int i = 0; i < a4.length; i++) {
		for (int j = 0; j < a4[i].length; j++) {
			a4[i][j] = random.nextInt(100);
		}
	}
	for (int i = 0; i < a4.length; i++) {
		for (int j = 0; j < a4[i].length; j++) {
			System.out.print(a4[i][j] + " ");
		}
		System.out.println();
	}
	System.out.println();

	a4 = new int[4][];
	for (int i = 0; i < a4.length; i++) {
		a4[i] = new int[random.nextInt(10)];
		for (int j = 0; j < a4[i].length; j++) {
			a4[i][j] = random.nextInt(100);
		}
	}
	for (int i = 0; i < a4.length; i++) {
		for (int j = 0; j < a4[i].length; j++) {
			System.out.print(a4[i][j] + " ");
		}
		System.out.println();
	}
}
}
